铜绿假单胞菌(pseudomonas aeruginosa,PA)是一种非发酵革兰阴性杆菌,广泛分布于自然界中,在水、空气等潮湿的环境中易于滋生和繁殖,因此,很容易污染医院器械和环境而造成感染。同时,它也是存在于人的皮肤与肠道的正常菌群之一,在人抵抗力下降(如:手术、放化疗、肿瘤及其他慢性 Pseudomonas aeruginosa (PA), a non-fermentative gram-negative bacillus, is widely distributed in nature and can easily colonize and multiply in humid environments such as water and air, thus easily contaminating hospital equipment and the environment And cause infection. At the same time, it is also one of the normal flora that exists in the human skin and intestine, with decreased immunity (such as surgery, radiotherapy and chemotherapy, cancer and other chronic